System, method and base station subsystem for realizing handover in local switch

Abstract

The present invention discloses a method for implementing a handover in a local switch, and the method includes: a core network transmitting indication information to a source base station subsystem during any terminal of communication parties which carries out a local switch is performing a base station subsystem handover, and the source base station subsystem determining whether to transmit user-plane speech data received from a media gateway to the terminal which has not performed the base station subsystem handover, or to transmit the user-plane speech data received from an internal link to the terminal which has not performed the base station subsystem handover, according to the indication information. The present invention also discloses a system for implementing a handover in a local switch as well as a base station subsystem.

What is claimed is: 
     
       1. A method for implementing a handover in a local switch, comprising:
 a core network transmitting indication information to a source base station subsystem during any terminal of communication parties carrying out the local switch is performing a base station subsystem handover, and the source base station subsystem determining whether to transmit user-plane speech data received from a media gateway to the terminal which has not performed the base station subsystem handover, or to transmit the user-plane speech data received from an internal link to the terminal which has not performed the base station subsystem handover, according to the indication information. 
 
     
     
       2. The method of  claim 1 , wherein:
 the indication information transmitted by the core network to the source base station subsystem is used to indicate whether the base station subsystem handover is completed or not, that is to indicate whether the speech data received by the source base station subsystem from the media gateway is valid or not. 
 
     
     
       3. The method of  claim 2 , wherein:
 the indication information is a user-plane speech frame, the media gateway in the core network indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different speech frame types. 
 
     
     
       4. The method of  claim 3 , wherein:
 the user-plane speech frame transmitted by the media gateway to the base station subsystem is a mute frame before the handover is completed, and the user-plane speech frame transmitted by the media gateway to the base station subsystem is a non-mute frame after the handover is completed. 
 
     
     
       5. The method of  claim 2 , wherein:
 the indication information is an indication identification, and the indication identification indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different values. 
 
     
     
       6. The method of  claim 1 , wherein:
 the indication information is a user-plane speech frame, the media gateway in the core network indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different speech frame types. 
 
     
     
       7. The method of  claim 6 , wherein:
 the user-plane speech frame transmitted by the media gateway to the base station subsystem is a mute frame before the handover is completed, and the user-plane speech frame transmitted by the media gateway to the base station subsystem is a non-mute frame after the handover is completed. 
 
     
     
       8. The method of  claim 1 , wherein:
 the indication information is an indication identification, and the indication identification indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different values. 
 
     
     
       9. A system for implementing a handover in a local switch, comprising a base station subsystem and a core network, the core network comprising a media gateway;
 wherein: 
 the core network is configured to transmit indication information to a source base station subsystem during any terminal of communication parties carrying out a local switch is performing a base station subsystem handover; 
 the source base station subsystem is configured to determine whether to transmit user-plane speech data received from a media gateway to the terminal which has not performed the base station subsystem handover, or to transmit the user-plane speech data received from an internal link to the terminal which has not performed the base station subsystem handover, according to the indication information. 
 
     
     
       10. The system of  claim 9 , wherein:
 the indication information transmitted by the core network to the source base station subsystem is used to indicate whether the base station subsystem handover is completed or not, that is to indicate whether the speech data received by the source base station subsystem from the media gateway is valid or not. 
 
     
     
       11. The system of  claim 10 , wherein:
 the indication information is a user-plane speech frame, the media gateway indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different speech frame types. 
 
     
     
       12. The system of  claim 11 , wherein:
 the user-plane speech frame transmitted by the media gateway to the base station subsystem is a mute frame before the handover is completed, and the user-plane speech frame transmitted by the media gateway to the base station subsystem is a non-mute frame after the handover is completed. 
 
     
     
       13. The system of  claim 10 , wherein:
 the indication information is an indication identification, and the indication identification indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different values. 
 
     
     
       14. The system of  claim 9 , wherein:
 the indication information is a user-plane speech frame, the media gateway indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different speech frame types. 
 
     
     
       15. The system of  claim 14 , wherein:
 the user-plane speech frame transmitted by the media gateway to the base station subsystem is a mute frame before the handover is completed, and the user-plane speech frame transmitted by the media gateway to the base station subsystem is a non-mute frame after the handover is completed. 
 
     
     
       16. The system of  claim 9 , wherein:
 the indication information is an indication identification, and the indication identification indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different values. 
 
     
     
       17. A base station subsystem in a local switch, the base station subsystem being a source base station subsystem during any terminal of communication parties carrying out a local switch is performing a base station subsystem handover; and the source base station subsystem being configured to:
 receive indication information sent by a core network to the source base station subsystem during any terminal of the communication parties carrying out the local switch is performing the base station subsystem handover; and 
 determine whether to transmit user-plane speech data received from a media gateway to the terminal which has not performed the base station subsystem handover, or to transmit the user-plane speech data received from an internal link to the terminal which has not performed the base station subsystem handover, according to the indication information. 
 
     
     
       18. The base station subsystem of  claim 17 , wherein:
 the indication information is used to indicate whether the base station subsystem handover is completed or not, that is to indicate whether the speech data received by the source base station subsystem from the media gateway is valid or not. 
 
     
     
       19. The base station subsystem of  claim 18 , wherein:
 the indication information is a user-plane speech frame, the media gateway in the core network indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different speech frame types. 
 
     
     
       20. The base station subsystem of  claim 19 , wherein:
 the user-plane speech frame transmitted by the media gateway to the base station subsystem is a mute frame before the handover is completed, and the user-plane speech frame transmitted by the media gateway to the base station subsystem is a non-mute frame after the handover is completed. 
 
     
     
       21. The base station subsystem of  claim 18 , wherein:
 the indication information is an indication identification, and the indication identification indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different values. 
 
     
     
       22. The base station subsystem of  claim 17 , wherein:
 the indication information is a user-plane speech frame, the media gateway in the core network indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different speech frame types. 
 
     
     
       23. The base station subsystem of  claim 22 , wherein:
 the user-plane speech frame transmitted by the media gateway to the base station subsystem is a mute frame before the handover is completed, and the user-plane speech frame transmitted by the media gateway to the base station subsystem is a non-mute frame after the handover is completed. 
 
     
     
       24. The base station subsystem of  claim 17 , wherein:
 the indication information is an indication identification, and the indication identification indicates whether user-plane data on a link between the source base station subsystem and the media gateway is valid or not through different values.